Attention! Solution for most of those next mode memory drivers!

Flashlight Modding and DIY Parts
14

HOORAY!

I got it!

Soldered a 1912 (19K, correct?) resistor on top of C1. It's the only resistor above 1K I got around, removed from a dead nanjg105.

I got lucky and now the East92 has a super-short memory wipe: quickly tap with the finger in less than half second, and it changes modes. Wait just a little bit more, less than 1 second, and it's always on high!

I love it now! So much that the planned driver swap with a nanjg (ready in case I fu**ed the east92) is not a priority anymore.

And the satisfaction of having soldered those damn tiny components is a great reward too. You should have seen (and heard...) me when in the process of placing the resistor in the right spot, it suddenly jumped off the board falling on the floor, literally covered with metal shavings and plastic dust (it's the same place I also have maintenance for RC models)

10 funny minutes spent in close examination of any dust with flashlight and tweezers...

15

Well done Rockspider. Perseverance has paid off. Your floor sounds a little like mine. Do you think you would have a go at the low voltage drivers I have tested with next mode memory?

16

MrsDNF I answered to you on the other thread

I'd have a go!

17

any ideas how to remove the next mode memory from this driver? :

18

Very similar (if not identical) to the driver in the SkyEye F13. See this post from relic38. Place said resistor over said capacitor.

-Garry

19

yeap its the same ,thank you.

and when i connected the 2 dots in the 0R i now have a 5 mode driver.

20

Help needed for this driver. :)

21

driver fixed now,i hate memory. (its a bit pain in the ass to solder some small resistors)
thanks again garry.

22

Could you please specify the mode change?

23

It adds medium and strobe

24

Which modes were there before?
Thanks for the information, never read that here…so if anyone has a link I would be happy.

I have seen this some times on drivers but never knew that there is a possible function.

25

I just made this:

https://budgetlightforum.com/t/-/20735#comment-453016

26

Thanks for clarification, I have some 5 mode sk98 driver flying around in my parts box. I will look later if it had the 0R connected on stock…

27

as racer did above.very easy mod don’t need any spare parts.

28

I do not understand. Why not just remove the capacitor?

29

If you remove capacitor you will only have one mode, first mode that is programmed (in most cases MAX).

30

Because without capacitor the memory will erase in zero time. You will never be able to change mode. Like a single mode only.

31

I made some single mode but decided against the removing because i wanted the option to go to other mods, this was made with 22k resistor.
So I can borrow it to anyone all they see is high but with a very short quarter press I am able to use all 4 other modes if needed…

32

Can someone link to a schematic of a driver that uses a cap to make the memory work? I am not understanding its implementation.

33

There is a backup capacitor, that is recharged at every startup, connected to the power pin. It uses brownout detection that is implemented in microcontroller and at each restart it checks for brownout flag (if the mcu restarted itself due to low power voltage/mode change/ or if it was turned off for a longer time). If you don’t add that resistor it stays powered in brownout mode thus it changes the mode at startup.

Correct me if I’m wrong :slight_smile: